In one embodiment, the present invention is directed to method for assigning coefficients to a texel of a parametric texture map texture. The system combines the transfer function with a minimum cure-induced stress profile, in order to obtain a time-temperature profile for minimizing cure-induced residual stress in an epoxy resin impregnated ignition coil. The base flange further includes three clips arranged around the circumference thereof, which are sprung in a direction perpendicular to the plane of the base flange and which cooperate with the reference tangs to mount the bulb in a headlight. A trapping concavity on a bypass side has larger internal volume than on a side opposite from the bypass.